Voltage warning (MIT310A only)
If a voltage exists on the circuit under test the voltmeter will indicate this.
However voltages under 50 V will be displayed but may be difficult to read
from the analogue display.
Default voltmeter (MIT310, MIT320 and MIT330)
The default voltmeter automatically operates if a voltage is present across
the test probes of greater than 25 V.
In Volts range the meter operates at greater than 2 V.
If the voltage exceeds 50 V any further testing is inhibited for safety.
The voltage will be displayed.
Backlight operation (MIT320 and MIT330 only)
Both the display and test ranges are backlit. The backlight function can be
selected at any time while the instrument is switched on by pressing the
BACKLIGHT
J
button.
The backlight function will switch off automatically 20 seconds after the
instrument has finished testing.
Display warning symbols
G
Refer to user manual
Any time the warning triangle is displayed the operator should refer to
the user manual for further information.
L
Range lock
Displayed at any time the [TEST] button is locked in the on position.
z
Lead nulled
Indicates that the test lead resistance has been removed from the test
result.
Battery condition indication. Refer to page 18.
f
Fuse blown indicator, appears when an instrument fuse has failed.
Refer to page 19.
Test lead connection
The Red/Black test lead set should be connected to the appropriate
sockets on the rear of the instrument and – respectively.
Test probes and crocodile clips are supplied for connection to the circuit
under test.
Fused test leads are available as an optional accessory, please refer to
accessories list at the end of this document.
Application
Do NOT connect this instrument to conductors that exceed the rated
voltage with respect to each other or with respect to earth.
This instrument may be connected to CAT III conductors up to 600 V AC,
or CAT IV conductors up to 300V AC.
See the safety warnings for the definition of CAT ratings.
To maintain user safety and ensure accurate measurements, only use the
test leads supplied by Megger Limited.
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